OFFSET
6,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 6..1000
FORMULA
Conjectures from Colin Barker, Dec 11 2018: (Start)
G.f.: x^6*(1 + 7*x + 28*x^2 + 33*x^3 + 122*x^4 + 286*x^5 + 394*x^6 + 638*x^7 + 687*x^8 + 652*x^9 + 433*x^10 + 319*x^11) / ((1 - x)^3*(1 + x)^2*(1 - x + x^2)*(1 + x^2)*(1 + x + x^2)^2*(1 + x + x^2 + x^3 + x^4)).
a(n) = -a(n-1) - a(n-2) + a(n-4) + 2*a(n-5) + 3*a(n-6) + 2*a(n-7) + a(n-8) - a(n-9) - 2*a(n-10) - 3*a(n-11) - 2*a(n-12) - a(n-13) + a(n-15) + a(n-16) + a(n-17).
(End)
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Nov 18 2018
STATUS
approved